On 03/30/2015 01:57 PM, Mark Rutland wrote:
On Mon, Mar 30, 2015 at 10:52:28AM +0100, Jacek Anaszewski wrote:This patch adds device tree binding documentation for the flash cell of the Maxim max77693 multifunctional device. Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx> Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> Cc: Lee Jones <lee.jones@xxxxxxxxxx> Cc: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> Cc: Bryan Wu <cooloney@xxxxxxxxx> Cc: Richard Purdie <rpurdie@xxxxxxxxx> Cc: devicetree@xxxxxxxxxxxxxxx --- Documentation/devicetree/bindings/mfd/max77693.txt | 63 ++++++++++++++++++++ 1 file changed, 63 insertions(+) - added range to maxim,boost-mvout and maxim,mvsys-min description diff --git a/Documentation/devicetree/bindings/mfd/max77693.txt b/Documentation/devicetree/bindings/mfd/max77693.txt index 38e6440..3d2103a 100644 --- a/Documentation/devicetree/bindings/mfd/max77693.txt +++ b/Documentation/devicetree/bindings/mfd/max77693.txt @@ -76,7 +76,55 @@ Optional properties: Valid values: 4300000, 4700000, 4800000, 4900000 Default: 4300000 +- led : the LED submodule device node + +There are two LED outputs available - FLED1 and FLED2. Each of them can +control a separate LED or they can be connected together to double +the maximum current for a single connected LED. One LED is represented +by one child node. + +Required properties: +- compatible : Must be "maxim,max77693-led". + +Optional properties: +- maxim,trigger-type : Flash trigger type. + Possible trigger types: + LEDS_TRIG_TYPE_EDGE (0) - Rising edge of the signal triggers + the flash, + LEDS_TRIG_TYPE_LEVEL (1) - Strobe pulse length controls duration + of the flash.Surely this is required? What should be assumed if this property isn't present?
LEDS_TRIG_TYPE_LEVEL allows for an ISP to do e.g. short flash blink before the actual strobe - it is used for eliminating photographs with closed eyes, or can serve for probing ambient light conditions. With LEDS_TRIG_TYPE_EDGE flash strobe is triggered on rising edge and lasts until programmed timeout expires. This setting is tightly related to a camera sensor, which generates the strobe signal. Effectively it depends on board configuration.
Otherwise this looks OK, but I'm not that familiar with LED/flash bindings. Mark.+- maxim,boost-mode : + In boost mode the device can produce up to 1.2A of total current + on both outputs. The maximum current on each output is reduced + to 625mA then. If not enabled explicitly, boost setting defaults to + LEDS_BOOST_FIXED in case both current sources are used. + Possible values: + LEDS_BOOST_OFF (0) - no boost, + LEDS_BOOST_ADAPTIVE (1) - adaptive mode, + LEDS_BOOST_FIXED (2) - fixed mode. +- maxim,boost-mvout : Output voltage of the boost module in millivolts. + Range: 3300 - 5500 +- maxim,mvsys-min : Low input voltage level in millivolts. Flash is not fired + if chip estimates that system voltage could drop below this level due + to flash power consumption. + Range: 2400 - 3400 + +Required properties of the LED child node: +- led-sources : see Documentation/devicetree/bindings/leds/common.txt; + device current output identifiers: 0 - FLED1, 1 - FLED2 + +Optional properties of the LED child node: +- label : see Documentation/devicetree/bindings/leds/common.txt +- max-microamp : see Documentation/devicetree/bindings/leds/common.txt + Range: 15625 - 250000 +- flash-max-microamp : see Documentation/devicetree/bindings/leds/common.txt + Range: 15625 - 1000000 +- flash-timeout-us : see Documentation/devicetree/bindings/leds/common.txt + Range: 62500 - 1000000 + Example: +#include <dt-bindings/leds/common.h> + max77693@66 { compatible = "maxim,max77693"; reg = <0x66>; @@ -117,5 +165,20 @@ Example: maxim,thermal-regulation-celsius = <75>; maxim,battery-overcurrent-microamp = <3000000>; maxim,charge-input-threshold-microvolt = <4300000>; + + led { + compatible = "maxim,max77693-led"; + maxim,trigger-type = <LEDS_TRIG_TYPE_LEVEL>; + maxim,boost-mode = <LEDS_BOOST_FIXED>; + maxim,boost-mvout = <5000>; + maxim,mvsys-min = <2400>; + + camera_flash: flash-led { + label = "max77693-flash"; + led-sources = <0>, <1>; + max-microamp = <500000>; + flash-max-microamp = <1250000>; + flash-timeout-us = <1000000>; + }; }; }; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html-- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
-- Best Regards, Jacek Anaszewski -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
